/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.iotdb.db.it.aligned;

import org.apache.iotdb.db.it.utils.AlignedWriteUtil;
import org.apache.iotdb.it.env.ConfigFactory;
import org.apache.iotdb.it.env.EnvFactory;
import org.apache.iotdb.it.framework.IoTDBTestRunner;
import org.apache.iotdb.itbase.category.ClusterIT;
import org.apache.iotdb.itbase.category.LocalStandaloneIT;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;
import org.junit.experimental.categories.Category;
import org.junit.runner.RunWith;

import java.sql.*;
import java.util.HashMap;
import java.util.Map;

import static org.junit.Assert.*;

@RunWith(IoTDBTestRunner.class)
@Category({LocalStandaloneIT.class, ClusterIT.class})
public class IoTDBAggregationWithDeletionIT {

    private static final double DELTA = 1e-6;
    protected static boolean enableSeqSpaceCompaction;
    protected static boolean enableUnseqSpaceCompaction;
    protected static boolean enableCrossSpaceCompaction;
    protected static int maxTsBlockLineNumber;

    @BeforeClass
    public static void setUp() throws Exception {
        enableSeqSpaceCompaction = ConfigFactory.getConfig().isEnableSeqSpaceCompaction();
        enableUnseqSpaceCompaction = ConfigFactory.getConfig().isEnableUnseqSpaceCompaction();
        enableCrossSpaceCompaction = ConfigFactory.getConfig().isEnableCrossSpaceCompaction();
        maxTsBlockLineNumber = ConfigFactory.getConfig().getMaxTsBlockLineNumber();
        ConfigFactory.getConfig().setEnableSeqSpaceCompaction(false);
        ConfigFactory.getConfig().setEnableUnseqSpaceCompaction(false);
        ConfigFactory.getConfig().setEnableCrossSpaceCompaction(false);
        ConfigFactory.getConfig().setMaxTsBlockLineNumber(3);
        EnvFactory.getEnv().initBeforeClass();
        AlignedWriteUtil.insertData();

        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {
            statement.execute("delete timeseries root.sg1.d1.s2");
            statement.execute("delete from root.sg1.d1.s1 where time <= 21");
        } catch (Exception e) {
            fail(e.getMessage());
            e.printStackTrace();
        }
    }

    @AfterClass
    public static void tearDown() throws Exception {
        EnvFactory.getEnv().cleanAfterClass();
        ConfigFactory.getConfig().setEnableSeqSpaceCompaction(enableSeqSpaceCompaction);
        ConfigFactory.getConfig().setEnableUnseqSpaceCompaction(enableUnseqSpaceCompaction);
        ConfigFactory.getConfig().setEnableCrossSpaceCompaction(enableCrossSpaceCompaction);
        ConfigFactory.getConfig().setMaxTsBlockLineNumber(maxTsBlockLineNumber);
    }

    @Test
    public void countAllAlignedWithoutTimeFilterTest() {
        String[] retArray = new String[]{"1", "28", "19", "20"};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "count(root.sg1.d1.s4)",
                "count(root.sg1.d1.s5)"
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet = statement.executeQuery("select count(*) from root.sg1.d1")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>(); // used to adjust result sequence
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void countAllAlignedAndNonAlignedWithoutTimeFilterTest() {
        String[] retArray = new String[]{"1", "28", "19", "20", "19", "29", "28", "18", "19"};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "count(root.sg1.d1.s4)",
                "count(root.sg1.d1.s5)",
                "count(root.sg1.d2.s1)",
                "count(root.sg1.d2.s2)",
                "count(root.sg1.d2.s3)",
                "count(root.sg1.d2.s4)",
                "count(root.sg1.d2.s5)"
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet = statement.executeQuery("select count(*) from root.sg1.*")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void countAllAlignedWithTimeFilterTest() {
        String[] retArray = new String[]{"1", "22", "13", "6"};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "count(root.sg1.d1.s4)",
                "count(root.sg1.d1.s5)"
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "select count(*) from root.sg1.d1 where time >= 9 and time <= 33")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    /**
     * aggregate multi columns of aligned timeseries in one SQL
     */
    @Test
    public void aggregateSomeAlignedWithoutTimeFilterTest() {
        double[] retArray = new double[]{1, 28, 230000, 390417, 230000, 13943.464285714286};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "sum(root.sg1.d1.s1)",
                "sum(root.sg1.d1.s3)",
                "avg(root.sg1.d1.s1)",
                "avg(root.sg1.d1.s3)",
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "select count(s1),count (s3),sum(s1),sum(s3),avg(s1),avg(s3) from root.sg1.d1")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    double[] ans = new double[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = Double.parseDouble(resultSet.getString(index));
                    }
                    assertArrayEquals(retArray, ans, DELTA);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    /**
     * aggregate multi columns of aligned timeseries in one SQL
     */
    @Test
    public void aggregateSomeAlignedWithTimeFilterTest() {
        double[] retArray = new double[]{1, 15, 230000, 230322, 230000, 15354.8};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "sum(root.sg1.d1.s1)",
                "sum(root.sg1.d1.s3)",
                "avg(root.sg1.d1.s1)",
                "avg(root.sg1.d1.s3)",
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "select count(s1),count (s3),sum(s1),sum(s3),avg(s1),avg(s3) from root.sg1.d1 where time>=16 and time<=34")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    double[] ans = new double[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = Double.parseDouble(resultSet.getString(index));
                    }
                    assertArrayEquals(retArray, ans, DELTA);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void countSingleAlignedWithTimeFilterTest() {
        String[] retArray = new String[]{"0"};
        String[] columnNames = {"count(root.sg1.d1.s1)"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery("select count(s1) from root.sg1.d1 where time>=16 and time<=20")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    StringBuilder builder = new StringBuilder();
                    // No need to add time column for aggregation query
                    for (String columnName : columnNames) {
                        int index = map.get(columnName);
                        if (builder.length() != 0) {
                            builder.append(",");
                        }
                        builder.append(resultSet.getString(index));
                    }
                    assertEquals(retArray[cnt], builder.toString());
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void sumSingleAlignedWithTimeFilterTest() {
        String[] retArray = new String[]{"null"};
        String[] columnNames = {"sum(root.sg1.d1.s1)"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery("select sum(s1) from root.sg1.d1 where time>=16 and time<=20")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    StringBuilder builder = new StringBuilder();
                    // No need to add time column for aggregation query
                    for (String columnName : columnNames) {
                        int index = map.get(columnName);
                        if (builder.length() != 0) {
                            builder.append(",");
                        }
                        builder.append(resultSet.getString(index));
                    }
                    assertEquals(retArray[cnt], builder.toString());
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void avgSingleAlignedWithTimeFilterTest() {
        String[] retArray = new String[]{"null"};
        String[] columnNames = {"avg(root.sg1.d1.s1)"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery("select avg(s1) from root.sg1.d1 where time>=16 and time<=20")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>();
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }

                int cnt = 0;
                while (resultSet.next()) {
                    StringBuilder builder = new StringBuilder();
                    // No need to add time column for aggregation query
                    for (String columnName : columnNames) {
                        int index = map.get(columnName);
                        if (builder.length() != 0) {
                            builder.append(",");
                        }
                        builder.append(resultSet.getString(index));
                    }
                    assertEquals(retArray[cnt], builder.toString());
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    // ----------------------- Aggregation with value filter -----------------------------
    @Test
    public void countAlignedWithValueFilterTest() throws ClassNotFoundException {
        String[] retArray = new String[]{"11"};
        String[] columnNames = {"count(root.sg1.d1.s4)"};
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery("select count(s4) from root.sg1.d1 where s4 = true")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>(); // used to adjust result sequence
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }
                assertEquals(columnNames.length, resultSetMetaData.getColumnCount());
                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void countAllAlignedWithValueFilterTest() throws ClassNotFoundException {
        String[] retArray = new String[]{"0", "9", "11", "6"};
        String[] columnNames = {
                "count(root.sg1.d1.s1)",
                "count(root.sg1.d1.s3)",
                "count(root.sg1.d1.s4)",
                "count(root.sg1.d1.s5)"
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery("select count(*) from root.sg1.d1 where s4 = true")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>(); // used to adjust result sequence
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }
                assertEquals(columnNames.length, resultSetMetaData.getColumnCount());
                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }

    @Test
    public void aggregationAllAlignedWithValueFilterTest() throws ClassNotFoundException {
        String[] retArray = new String[]{"0", "25", "1"};
        String[] columnNames = {
                "count(root.sg1.d1.s1)", "max_time(root.sg1.d1.s4)", "min_value(root.sg1.d1.s3)",
        };
        try (Connection connection = EnvFactory.getEnv().getConnection();
             Statement statement = connection.createStatement()) {

            try (ResultSet resultSet =
                         statement.executeQuery(
                                 "select count(s1), max_time(s4), min_value(s3) from root.sg1.d1 where s4 = true")) {
                ResultSetMetaData resultSetMetaData = resultSet.getMetaData();
                Map<String, Integer> map = new HashMap<>(); // used to adjust result sequence
                for (int i = 1; i <= resultSetMetaData.getColumnCount(); i++) {
                    map.put(resultSetMetaData.getColumnName(i), i);
                }
                assertEquals(columnNames.length, resultSetMetaData.getColumnCount());
                int cnt = 0;
                while (resultSet.next()) {
                    String[] ans = new String[columnNames.length];
                    // No need to add time column for aggregation query
                    for (int i = 0; i < columnNames.length; i++) {
                        String columnName = columnNames[i];
                        int index = map.get(columnName);
                        ans[i] = resultSet.getString(index);
                    }
                    assertArrayEquals(retArray, ans);
                    cnt++;
                }
                assertEquals(1, cnt);
            }
        } catch (SQLException e) {
            e.printStackTrace();
            fail(e.getMessage());
        }
    }
}
